Changing Your Ontario Corporation's Name: Process, Requirements, and Pitfalls

Your Ontario corporation's legal name is more than a label — it's a legally significant identifier recorded on the Ontario Business Registry and embedded in every contract, government filing, and corporate document you've ever produced. Changing it is possible, but it requires a formal legal process under the Business Corporations Act (Ontario) — the OBCA.

Whether you're rebranding after a pivot, dropping a departed partner's name, or simply updating to reflect what your business has become, this guide explains exactly how to change your Ontario corporation's name, what requirements apply, and what you'll need to do after the legal name change is complete.

Why Corporations Change Their Name

Common reasons Ontario corporations change their legal name include:

• Rebranding or marketing refresh
• Change in business focus or product line
• Removal of a founder or partner who is no longer involved
• Merger or acquisition where a unified brand is desired
• The original name was descriptive and now feels limiting
• Conflict with a recently discovered trademark or competitor

Whatever the reason, the process is the same: a NUANS search, a special resolution, articles of amendment, and a set of downstream updates.

Step 1: Choose a New Name That's Available and Compliant

NUANS Search

Before you can file to change your name, you must conduct a NUANS (Newly Upgraded Automated Name Search) report for the proposed new name. NUANS is a federal name-search system that identifies existing business names and trademarks across Canada that are the same as or similar to your proposed name.

A NUANS report for an Ontario name change must be dated no more than 90 days before the articles of amendment are filed. If your NUANS report expires before filing, you'll need a fresh one.

NUANS searches can be ordered through approved searchers and third-party service providers. As of writing, government fees and provider fees apply — verify current pricing.

Name Requirements Under the OBCA

A proposed Ontario corporate name must:

• Be distinctive — not the same as or confusingly similar to an existing corporation, business name, or registered trademark
• Include a legal element: "Limited," "Incorporated," "Corporation," or their French equivalents or abbreviations (Ltd., Inc., Corp.) — this signals that the entity is a limited liability corporation
• Not be prohibited or deceptively misdescriptive (e.g., a corporation cannot include "bank" or "trust company" without regulatory approval)
• Not be purely descriptive or a number

If you don't want to go through the name approval process, Ontario also allows a corporation to use a number name (e.g., 1234567 Ontario Inc.) — but you're reading this article because you probably want a real name.

Consider Trademark Implications

A NUANS search is not a trademark search. Two businesses can coexist with similar names in different industries, and NUANS won't catch every potential conflict. If your new name is going to be central to your brand, run a separate trademark search or engage a trademark lawyer before committing. A name change that infringes an existing trademark can lead to costly rebranding down the road.

Step 2: Pass a Special Resolution

Changing the corporation's name is a fundamental change under the OBCA, requiring a special resolution of the shareholders — meaning at least two-thirds of the votes cast.

For a single-shareholder corporation, this is a signed written special resolution. The resolution should:

• Identify the current corporate name
• Identify the proposed new name
• Confirm that the shareholders authorize the amendment to the articles

This resolution goes into the minute book alongside the articles of amendment.

Step 3: File Articles of Amendment with the Ontario Business Registry

The legal change is effected by filing Articles of Amendment with the Ontario Business Registry. The Articles of Amendment include:

• The current corporate name and Ontario Corporation Number (OCN)
• The proposed new name
• The NUANS search report (typically attached or referenced)
• Confirmation of shareholder authorization

As of writing, there is a government filing fee for articles of amendment — verify the current fee at ontario.ca/businessregistry.

Once the OBR accepts the filing and issues a Certificate of Amendment, the new name is legally effective. Your corporation's Ontario Corporation Number stays the same — it's the name that changes, not the underlying legal entity.

Step 4: Update Everything After the Name Change

This is where the real work begins. A legal name change triggers a cascade of required updates across your business:

Government and Regulatory Records

• CRA business number: notify the CRA of your legal name change (your Business Number stays the same)
• HST/GST account: update with the CRA
• Payroll accounts: update with the CRA
• Provincial tax accounts: as applicable

Corporate Records

• Update the minute book (file the Certificate of Amendment; note the name change in the register of directors, shareholder register, and resolutions)
• Update the ISC register if it references the old name

Banking and Financial

• Notify your bank and all financial institutions of the name change
• Update all accounts, credit facilities, and authorized signatory documentation
• Update any payment processors, merchant accounts, or financial platforms

Legal and Commercial Documents

• Notify all material customers, suppliers, and landlords of the name change
• Update all ongoing contracts where the old name is used (many contracts require notice of a name change)
• Update insurance policies (name change is a material fact for insurers)
• Update any professional licences, permits, or regulatory registrations

Branding and Online Presence

• Update your website, domain name, social media handles, email addresses
• Update business cards, letterhead, signage, and marketing materials
• Ensure old-name materials are retired to avoid customer confusion

What About Operating Under a Trade Name?

A related but distinct concept: if you want to operate under a name that is different from your legal corporate name (e.g., your corporation is "1234567 Ontario Inc." but you want to sell as "Sunrise Bakery"), you can register a business name (trade name) under Ontario's Business Names Act without changing the legal name of the corporation. This is a simpler process but provides fewer legal protections than a true name change.

Frequently asked questions